You will need a tool to get a grasp of the cache. To make it more challenging, I'm not telling you what kind of tool is most appropriate.
The cache is in very public area, so it is advisable to come outside the office hours. Once you have logged the cache, place it carefully just like it was before your visit.
NOTE: Do NOT use force to get a hold of the cache. Using excessive force might make it impossible for anyone to get the box.
Reviewer note: This cache is exceptionally close to another cache, but there's no risk of confusion with them.
Tahu Nuva - geocaching.com volunteer reviewer